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Effect of mesa geometry on low-terahertz frequency range plasmons in two-dimensional electron systems

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Title: Effect of mesa geometry on low-terahertz frequency range plasmons in two-dimensional electron systems
Authors: Dawood, A
Park, S
Parker-Jervis, R
Wood, C
Li, LH
Linfield, EH
Davies, AG
Cunningham, J
Sydoruk, O
Item Type: Journal Article
Abstract: We demonstrate engineering of the low-terahertz range plasmonic spectra of two-dimensional electron systems by modifying their geometry. Specifically, we have modelled, fabricated, and measured two devices for comparison. The first device has a rectangular channel, while the second is trapezoidal, designed to support a richer plasmonic spectrum by causing variation in the device width along the direction of plasmon propagation. We show that while plasmon resonant frequencies and field distributions in the rectangular device can largely be described by a simple one-dimensional analytical model, the field distributions modelled in the trapezoidal device shows a more complex pattern with significant variation along the length of the channel, so requiring a two-dimensional treatment. The results illustrate the potential of modifying the channel geometry to obtain different spectra in experiments, with potential applications in the design of novel terahertz-range devices, such as plasmon-based sources and detectors.
Issue Date: 6-Sep-2021
Date of Acceptance: 6-Sep-2021
URI: http://hdl.handle.net/10044/1/91536
DOI: 10.1088/1361-6463/ac2401
ISSN: 0022-3727
Publisher: IOP Publishing
Start Page: 1
End Page: 10
Journal / Book Title: Journal of Physics D: Applied Physics
Volume: 55
Issue: 1
Copyright Statement: As the Version of Record of this article is going to be/has been published on a subscription basis, this Accepted Manuscript will be available for reuse under a CC BY-NC-ND 3.0 licence after a 12 month embargo period. Although reasonable endeavours have been taken to obtain all necessary permissions from third parties to include their copyrighted content within this article, their full citation and copyright line may not be present in this Accepted Manuscript version. Before using any content from this article, please refer to the Version of Record on IOPscience once published for full citation and copyright details, as permission may be required. All third party content is fully copyright protected, unless specifically stated otherwise in the figure caption of the Version of Record.
Sponsor/Funder: Engineering & Physical Science Research Council (E
Funder's Grant Number: EP/R004994/1
Keywords: Science & Technology
Physical Sciences
Physics, Applied
two-dimensional electron systems
Applied Physics
02 Physical Sciences
09 Engineering
Publication Status: Published
Online Publication Date: 2021-09-06
Appears in Collections:Electrical and Electronic Engineering
Faculty of Engineering

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